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2. USB Debugging Mode should be enabled on the phone by navigating to Settings >> Developer Options.

3. Back up your important data to avoid potential data loss during firmware installation.

4. Ensure the phone is factory unlocked (not locked to any specific carrier).

5. Verify Galaxy S4 LTE has at least 80 percent battery charge.

6. The Android CF-Auto-Root is compatible with Galaxy S4 (LTE) GT-I9505 only. Do not attempt installing it on GT-I9500 or any incorrect variants as it may brick the device. Verify the model number of the Galaxy S4 by navigating to Settings >> About Phone.

Step 2: Power off the Galaxy S4 LTE and boot it into Download Mode by pressing and holding Volume Down, Home and Power buttons together until a construction Android robot icon with a warning triangle appears on screen. Then keep tapping Volume Up button to enter Download Mode.

Step 3: Launch Odin on the computer as Administrator.

Step 4: Connect the Galaxy S4 LTE to the computer with a USB cable in Download Mode. Wait until Odin recognises the device and the ID: COM box will turn light blue with the COM port number. Furthermore, when the device is connected successfully, a message saying "Added!" appears on screen.

Step 8: After the root installation process completes, your phone will reboot and soon a PASS message with green background appears in the left-most box at the very top of Odin. It is now safe to disconnect the USB cable and remove the phone from the computer.

Samsung Galaxy S4 (LTE) I9505 is now rooted on the official Android 5.0.1 Lollipop firmware. It is now possible to install any app that requires root permission.

Alternately, download and install Root Checker app from Google Play Store to confirm the root status of the device.